Arc
-If you have a inscribed angle the arc is half of the inscribed angle
-if the inscribed angle has the same points as a central. The inscribed angle is 1/2 of central anlge
-If you have central angle. arc measure=C* degree/360
-Major arc= 180-360. Minor arc=179-0
Tangents
-if the line is tangent then it is perpendicular to the radius
-if a secant intersects a tangent at p.o.t.=1/2 the arc measure
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Secants
-if 2 secants intersect in interior of the circle then the angle measure is average the opposite arcs
-if 2 secants intersect outside of the circle -2 arcs then divide by 2
-If you have a inscribed angle the arc is half of the inscribed angle
-if the inscribed angle has the same points as a central. The inscribed angle is 1/2 of central anlge
-If you have central angle. arc measure=C* degree/360
-Major arc= 180-360. Minor arc=179-0
Tangents
-if the line is tangent then it is perpendicular to the radius
-if a secant intersects a tangent at p.o.t.=1/2 the arc measure
-
Secants
-if 2 secants intersect in interior of the circle then the angle measure is average the opposite arcs
-if 2 secants intersect outside of the circle -2 arcs then divide by 2